Plier type stapling machine



Dec. 4, 1934. F. POLZER 1,983,397

PLIER TYPE STAPLING MACHINE Dec. 4, 1934.

F. POLZER PLIER TYPE STAPLING MACHINE Filed Nov. 27, 1931 2 Sheets-Sheetl 2 Patented Dec. 4, 19,34 y l l UNITED STATES PATENT OFFICE PLIER TYPE sTAPLING MAonnvE Fridolin Polzer, South Norwalk, Conn. Application November 2v, 1931, serial No. 577,419'

21 claims. (oi. 1-49) This invention relates to new and useful-im- Fig. 9 is a View similar to Fig. 8 but showing provements in stapling machines and has parthe relative location of parts as the plunger ticular relation to a plier type stapling mamoves to drive a staple; chine of the kind used for stapling together Fig. 10 is a perspective view on an enlarged the various pages of documents and the like.A scale of the plunger removed; y y 60 An object of the invention is to provide a Fig. k11 is a perspective view on an enlarged stapling machine of the character stated and scale of a removable closure for one end of the which is of generally improved construction housing; whereby staples may be accurately driven, the A Fig. 12 is a view on an enlarged scale from machine is prevented'from clogging, and the the rear of the part Fig. 4; 65 machine is easy to operate. Fig. 13 is an elevational view on an enlarged Another object is to provide a plier type stascale of the pivoted housing looking from the pling machine so constructed that the parts may left in Fig. 3; and v be formed of sheet metal and may be easily and Fig. 14 is a sectional view of the main housing 15 quickly assembled whereby the machine may alone substantially on line 14-14 of Fig. 2, the 70 be manufactured at a relatively low cost. dotted lines suggesting the mannerA of forming Other objects and advantages will become apthe said housing. parent from a consideration of the following Referring in detail to the drawings the irndetailed description taken in connection with prOVed plier type stapling machine as here diS- the accompanying drawings wherein a satisfac- Closed includes a main housing 15v here ShOWn 75 tory embodiment of the invention is shown. as formed of a single piece of sheet metal. In However, it willbe understood that the inventhe formation of the housing the sheet metal is tion is not limited to the details disclosed but fOlded t0 provide 2, bOtOm Wall 16, Side Walls 17 includes all such variations and modifications and 18 andabutting portions 19 forming a '60p as fall within the spirit of the invention andA Wall. The portions 19 are connected as by a 80 the scope of the appended claims to which Strap 20 to which the portions may be pinned claims reference should be had for a denition 0r Otherwise Secured whereby the housing iS held of the invention. in shape. Also, formed integral with the hous- In the drawings: ing is a rearwardly extending curved handle or Fig. 1 is a side elevational View showing the grip 21- 85 improved stapling machine completely assem- The side walls 17 and 18 of the housing are bled, parts of the housing being broken away; cut away to provide the mouth or notch 22 into Fig. 1a is a side elevation of the front porwhich papers or the like 22a. to be stapled totion of the machine showing the position ofthe gether are inserted. Disposed on the bottom pivoted housing during the operation of setting wall 16 of the housing below the notch U22 is an 90 the staples; i anvil bar 23 secured in place as by rivets 24 and Fig. 2 is a side elevational view of the same being shaped to provide the anvil recesses 25 showing an assembly or disassembly operation; which bend or fOld the prOngS 0f the Staples Fig. 3 is a. perspective view of the pivoted against the under side of the papers and thus or movable housing; clinch the staple in the usual manner after the 95 Fig. 4 is a perspective view of a part to be prongs have been forced through the papers assembled on the pivoted or movable housing of by the plunger. At the front end the housing Fig. 3; l5 may be closed as by a removable cap or clo- Fig. 5 is a` transverse sectional view taken sure member 26 while at its rear end the houssubstantially along the line 5 5 of Fig. 3; ing is left open for a purpose to be described. 100 Fig. 6 is a perspective view of the follower Adjacent their forward edges and at the upper mechanism parts being broken away; sides of the notch 22, the side Walls 17 and 18 Fig. 7 is a view partly in top plan and partly of the housing are notched as at 27 and the cap in section just-under the'top wall of the main or closure 26 has upwardly curved portions 28 30 housing and on an enlarged scale; to engage in these notches when the closure is 105 Fig. 8 is a sectional view onvan enlarged scale assembled on the housing. The closure may through the forward portion of l the pivoted be assembled on the housing by engaging the housing and showing the raceway and the portions 28 in the notches 27 and then forcing plunger disposed therein in its retracted posithe upper edge portion 29 of the closure over the '5 tion: reduced edge portions 30 of the side walls after 1 10 which a pin 31 may be inserted 'through the openings 32 in the closure which openings will be in registry with openings 33 in the side walls 17 and 18 of the housing. Other means may be employed for mounting this closure.

Disposed within the main housing is a pivoted or movable staple supporting housing 34 also shown as formed of a single piece of sheet metal. Staple supporting housing 34 includes. a longitudinally extending portion 35 which is hollow and within which is mounted. a guide or guide bar 36 for a strip of staples 64 in the forward end portion of which is arranged a shear block 37, the block being secured in place as by a rivet 38. (See Figs. 8 and 9); As shown in Fig. 5 the guide 36 may be secured to the elongated portion 35 of the pivoted staple supporting housing as by rivets 39 and the upper edge portions of the portion 35 of the pivoted staple supporting housing are slightly inturned as at 40 whereby they are disposed in vertical spaced relation to the upper edges of the guide 36. The guide 36 is of substantially U-shape in cross section and may be formed from sheet metal.

Formed with the forward end'portion of the portion 35 of the pivoted housing 34 is a part 41 adapted with the part 42 (see Fig. 4) to provide a head 43 containing a guideway and raceway in which a plunger will operate to drive staples. The part 41 of head 43 includes vertically extending side walls 44 having their upper ends turned toward one another as at 45 and the forward edges of these side walls are turned outwardly to provide surfaces 46 adapted to form one sidefof a guideway for the plunger as will later appear. Further, after the formation of the surfaces 46 the side walls are turned to have their edges face forwardly as at 47 to provide shallow walls defining the edges of the guideway.

The part 42 of the head 43 is also disclosed as formed of a single piece of sheet metal and this part includes side walls off-set as at 48 providing wall portions 49 and 50, the part being so proportioned that when assembled on the part 41 to form the head 43 the wall portions 49 are disposed against the forward end portions 51 of the elongated portion 35 of the pivoted staple supporting housing while the olf-set 48 will be disposed on the forward portions of the inturned upper edges 40 of the portion 35 and the portions will embrace the lower portions 52 of the side walls 44 of part 41; Part 42 also includes vertically extending portions 53 connected by outwardly off-set bight portions 54 and shaped to provide grooves 55.

In assembling the part 42 on the part 41 the portions 46 and 47 of the side walls of part 41 are received in the grooves 55 of the part 42, the parts being assembled by sliding part 42 downwardly over part 41. This will arrange the side portions of the part 42 as described above and the parts may be secured in assembled relation as by inserting a pin 56 through the openings 57 of the part 42 and 58 of the part 41 which openings will be in registering relationship; When the parts have been assembled as described a staple driver guideway 59 will have been provided including a staple raceway 59a (Fig. 8) at its lower end at the forward end of the staple guide 36, one side of the guideway being represented by the portion 46 of' the part 41 and the opposite'side being represented byN the opposed surfaces of the grooves 55 of the Lees/,eer

part 42, the edges of the guideway being dened by the shallow walls provided when the forward edges 47 of the side walls 44 of part 41 are turned to extend forwardly as above described.

As shown in Figs. 8 and 9 the guide 36 extends to one side of the raceway 59a., the shear block 37 being disposed in this end of the guide. Opposite vthe guide the part 42 of the head 43 carries a dog or pawl 60 pivoted as by a pin 61 and the forward portion of the bottom wall of the guide and the forward edge of the block are slotted or recessed as at 62 and 63 respectively to accommodate this pawl or )dog in certain of its movements. The purpose of the pawl 66 is to prevent more than one staple entering the raceway at a time. That is, owing to the action of this pawl 60 a second staple may not enter the raceway until the first staple to enter the raceway has been driven therefrom. When a staple is in the raceway below the level of the y top of the staple strip guide bar 36 the connecting bar of this staple indicated at 64a, Fig. 9 engages the front edge of the pawl or lever 60 and swings it to the position shown in Fig. 9 so that the upper lug portion 60a engages the forward staple of the strip still on the guide bar and prevents another staple entering the raceway until the first staple 64a. has been rforced from the raceway. The pawl is preferably so shaped as to push the staple strip back a short distance against the action of feed spring 71. This pawl or dog 60 constitutes a safety feature to prevent clogging of the machine by jamming of a plurality of staples in the raceway which might otherwise take place if the plunger were partly depressed and then allowed to its upper position without setting the staple. This safety device is fully disclosed and claimed in my prior Patent No. 1,829,537 issued October 27, 1931.

Guide bar 36 is adapted to receive a staple strip 64 and a spring pressed follower 65 is adapted to be mounted on the guide bar and normally act to urge the staple strip toward the raceway and feed the staples one at a time into the raceway. The follower is se shaped as to slide along the guide bar and is slidably mounted oni a bar or rod 66 passing through a sleeve 67 at the underside of the follower, the ends of this sleeve passing through a slot in the top wall of the follower and folded'againstl this wall as indicated at 65a., Fig. 6'. On the rear end of the bar or rod 66 is a head 68 having a bayonet slot 69 to co-operate with a projtion 70 (Figs. 1, 2 and 3) which may be pressed from the underside of the guide bar adjacent its rear end.y

A staple strip may be disposed on the guide bar and then the follower is slipped over the guide bar and pushed forwardly to move the strip toward the raceway. The follower may have an upstanding lug 65h guided in the slot 35a and insuring proper engagement of the follower with the end of the staple strip. When the strip reaches the raceway further movement of the strip is impossible except as the staples are cut off by the plunger and further movement of the head 68 into a position over the end .of the guide bar to dispose the lug 70 in the bayonet slot 69 and thus secure the parts together, is made possible by the telescoping of the rod or bar 66 through the sleeve 67. A spring 71 surrounding the rod 66 and bearing at one end against the sleeve 67 and at its other end against the head 68 yieldingly forces the follower 65 forwardly. This spring is compressed when the With the cap or closure 26 removed the pivoted staple supporting housing 34 which includes the assembled head 43 is inserted into the main 4housing 15 through the forward end thereof.

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At its underside the elongated portion 35 of housing 34 carries a clip 72 having downwardly extending perforated side portions 73 adapted to be brought into registry with openings 74 in the main housing whereby the housing 34 is pivotally mounted within the main housing as on' a vrpivot 75. This clip may be secured to the under- Isidegof the portion 35 by lany suitable means as alrivet 72a (Figs. 1 and 5).

In Fig. is shown the plunger A76 when removed from theV guideway 59 in the operating head 43. This plunger as shown is in the form of a strip .of metal slotted as at 77 to straddle the dog or pawl 60 when the plunger is operated to drive a staple. Toward its upper end .the plunger is provided with an opening 78 into lwhich projects a reduced extension 79 on an operating member or lever 80. Obviously the :plunger 76 is to be reciprocated in the guideway 59 to set the staple.

Extending through the rear open end of the main housing is 'an operating handle 81 pivoted between the side walls 17 and 18 ofthe housing as on a pivot 82. The operating member or lever 80 likewise is pivoted on the side walls 17 and 18of the housing as by means of a pivot 83. It will be noted especially by an in- ,spection of Fig. 1 that the pivot 82 is intermediate the ends of the handle 81 and that the pivot 83 is intermediate the ends of the operat- 'ing member or lever 80. From Fig. 7 it will be clear that the inner end portion 84 of the handle 81 is bifurcated and has its extreme invner end portions turned toward one another to provide slightly spaced portions 85 between which extend one end portion of the operating fmember or lever 80.`

The overlapping portions of the handle 81 and vthe member 80 are connected by a pin and slot connection comprising a pin 88 carried by the extreme end portions 85 of the handle and a slot 87 in the member 80. It will be apparent that each be the member 80 being pivoted intermediate its ends the said member will serve to reverse the direction of movement of the inner end of the handle with respect to the motion delivered to the plunger. That is, as the outer portion of handle 81 is .moved toward the corresponding portion of the handle 21 the inner end portion of handle 81 will move upwardly. 'Ihis will result in a corresponding movement of the rear portion of the member 80 with the result that the forward portion 79 of the member 80 will move downwardly operating the. plunger to drive a staple.' I

A spring 88 is disposed about the pivot 82 and has one arm 89 bearing against the underside of the handle 81 to-thus tend to raise it and has its other arm 90 engaging the elongated portion of the pivoted staple supporting housing. 34 forwardly of the pivot for said housing. 'I'he -full function of this spring will later be de- Operating member adjacent its forward end is rather'sharply reduced .to provide the extension 79. Immediately in the rear of this extension 79 the portion 91 of the member 80 isV 'housing 34 including the part 41 of the operating head'43 is also formed of a single sheet of metal. The guide 36 may be formed of sheet metal and the part 42 of the operating head is formed of a single piece of sheet metal. From this it will'be seen that substantially the entire machine may be formed of sheet metal stamp- -ings and that the cost ofy manufacture is therefore kept low.

After the guide has been secured in the pivoted housing 34 and the part 42 (Fig. 4) has been assembled on the part 41 of the pivoted housing the said pivoted housing is inserted through the forward end of the main housing as suggested in Fig. 2, it ybeing understood that the cap or closure 26 has been removed or has not as yet been secured on the housing. The plunger 76 must, of course, be disposed in the guideway 59 prior to the insertion of the pivoted housing 34 into the main housing. As the housing' 34 is being inserted into the housing 15 the handle,

81 may be operated to throwthe forward end of the operating member 80 downwardly into a position to enter the. opening 78 in the plunger.

With the housing 34 disposed to have its pivot openings in its parts 73 aligned with the proper opening'74 in the main housing the handle 81 may .be manipulated to operate the plunger for the purpose of determining whether or not the reduced portion 79 of the member 80 has entered the opening 78 in the plunger. Next, the pivot 75 is inserted through'these registering openings whereby to pivotally mount the housing 34. In the foregoing description it has, of course, been assumed that the handle 81 andl the operating Jmember 80 were previously mounted in the housing, the assembling operation for these parts being apparent. IIhe pivots 75, 82 and 83 may of the kind clearly shown in Fig. 7 and each include two parts inserted from the opposite sides of the housing 15 and threaded together. When the partshave thus been assembled the cap or closure 26 may be applied as already fully described.

Next a staple strip. is disposed on the guide 36 and the follower mechanism assembled on the guide as already described. In the operation of the machine the papers `to be stapled together are disposed in the mouth or notch 22 as indicated at 22a (Fig. la) and the handle 81 is then pressed in the direction of the handle 21. This results in a compressing of the spring 88 with the result that the pressure of the spring exerted Ithrough the pivoted housing 34 forwardly of its pivot-f 75 is materially increased. As this pressure is increased the pivoted staple supporting housing is rocked on its pivot so as to throw its forward end, that is its end carrying the head 43, downwardly toward the anvil 25 until the 'forward portion of the pivoted housing engages the maarm 90 thereof on the movement being with the forward end of lever e@ as the wallsy 4.5 are pressed against the top edge of this lever by the force or" spring arm 90. Further downward movement of the handle 81 or further movement of this handle toward the handle 21 will result in the plunger being operated to drive a staple as the movable housing 3a is arrested, it being understood that there is some little play of the extension '19in the opening 78 in the plunger. The initial rnovement of the handle 81 to operate or rock the pivoted staple supporting housing 34 as above described is also made possible through the pin and slot connection between the handle and the member 80.' From what has been said it will be seen that before a staple is driven from the raceway and as a matter of fact before the plunger cuts a staple from the strip the pivoted staple supporting housing has been moved to dispose the lower open end of the raceway against the material to be stapled, and therefore the walls of the raceway will guide the staple as its prongs are forced through the articles to be stapled.

On the handle 81 being released after a staple has been driven the spring 88 acts first to start the handle back toward normal position. During this movement of the handle the operating member 80 will, of course, be rocked about its pivot and its portion 91 (Figs. 8 and 9) will engage the end portions 45 of the walls 44 of the member 4l with the result the pivoted staple supporting housing will have its forward end portion rocked upwardly to return it to its normal position. Of course, as the parts return toward normal position the plunger is drawn upwardly to its inactive position in the guideway above the point where the staples of the staple strip 64 are fed into the raceway.

This construction and arrangement provides plenty of leverage so that the staples can be driven with comparative ease and the device can be operated for a long time without tiring the operator.

Having thus set forth the nature of vention, what I claim is:

' l. In a plier type stapling machine, a housing having a handle rigid therewith, a handle pivoted to said housing, a staple supporting housing pivotally mounted in the first housing, a head cn said pivoted housing, said head having a guideway providing a raceway therein, an anvil stationary on the rst housing below said raceway, a plunger slidable in the guideway toward and from the anvil, a guide in the pivoted staple supporting housing for a staple strip, means for feeding the staple striptoward the raceway to dispose the irst staple ofthe strip in the racemy inway below thplunger, and a connection between E the pivoted handle and the plunger adapted on operation of said handle to permit swinging of the staple supporting housing toward the anvil and to move the plunger in a direction to drive a staple.

2. In a plier type stapling machine, a housing having a handle rigid therewith, a handle pivoted .to said housing, a staple supporting housing pivotally mounted in the first housing, a head on said pivoted housing, said head having a raceway therein, an anvil on the first housing below said raceway, a plunger slidable in the raceway toward and from the anvil, a guide in the pivoted housing for a staple strip, a follower for normally urging the staple strip toward the raceway to dispose the first staple of the strip in the raceway below the plunger, a spring engaging the pivoted handle and the pivoted housing, a connection between the pivoted handle and the plunger, said spring adapted on movement of the pivoted handle to rock 'the pivoted housing on its pivot to move its head toward the anvil, said handle on further movement adapted through its connection with the plunger to operate the same in a direction to drive a staple, and said spring adapted to return the parts to normal position on the pivoted handle being released.

3. In a plier type stapling machine, a housing having a handle rigid therewith, a handle pivoted to said housing, a housing pivotally mounted in the first housing, a head on said pivoted housing, said head having a raceway therein, an anvil on the iirst housing below said raceway, a plunger slidable in the raceway toward and from the anvil, a guide for a staple strip in the pivoted housing, a follower for normally urging the staple strip toward the raceway to dispose the first staple of the strip in the raceway below the plunger, a spring about the pivot of the pivoted handle and normally urging said handle toward inoperative position, said spring having an arm engaging the pivoted housing forwardly of its pivot, a connection between the pivoted handle and the plunger, said spring adapted on the pivoted handle being moved against the action of the spring to rock the pivoted housing on its pivot to move its head in the direction of the anvil, said handle on further movement adapted through its connection with the plunger to operate the same in a direction to drive` a staple, and said spring adapted to return the parts to normal position on the handle being released.

4. In a plier type stapling machine, a housing, a handle pivoted to said housing, a staple supporting housing movably mounted in the rst housing, a head on said movable housing, said head having a raceway therein, an anvil on the rst housing below said raceway, a plunger slidable in the raceway toward and from the anvil, a guide for a staple strip in the movable housing, means for advancing the staple strip toward the raceway to dispose the iirst Istaple of the strip in the raceway below the plunger, a

connection between the handle and the movable housing, a connection between the handle and the plunger, and said handle adapted on initial movement to shift the movable housing to move its head toward the anvil and on further movement to operate the plunger in a direction to drive a staple.

5. In a plier type stapling machine, a housing, a handle pivoted to said housing, a staple supporting housing movably mounted in the first housing, a head on said movable housing, said head having a raceway therein, an anvil on the rst housing below said raceway, a plunger slidable in the raceway toward and from the anvil, a guide for a staple strip in the movable housing, means for advancing the staple strip toward the raceway, a spring connection between the handle and the movable housing, a connection between the handle and plunger, said handle adapted on initial movement to compress the' spring and shift the movable housing to move its head toward the anvil and on further movement to operate the plunger in a direction to drive a staple, and said spring adapted to return the parts to normal position on the handie being released. i Y

6. In a plier type stapling machine, a housing having substantially parallel side walls, a bottom wall, an open end and a handle integral with its open end portion, said housing formed of a single sheet of metal, an anvil mounted in the housing, a head within' the housing, said head having a raceway therein movable toward and from the anvil, a guide for a staple strip, means for feeding the staple strip along the guide to feed the staples into the raceway, ua plunger in the raceway and movable therein to drive the staples, a pivotally mounted handle extending through the open end of the housing,

and a connection between the pivoted handle and the. plunger whereby on operation of the handle the head is shifted toward the anvil and the plunger may be operated to drive a staple.

'7. In a plier type stapling machine, a housing having substantially parallel side Walls, a bottom wall, an open end and a handle integral with its open end portion, said housing formed of a single sheet of metal, a head within the housing, said head`having a raceway therein, a guide for a staple strip, a follower for normally urging the staple strip along the guide to feed the staples to theraceway, a plunger in the raceway and movable therein to drive the staples, a handle extending through the open end of the housing and pivotally mounted on a side wall thereof, an operating member arranged within the housing and pivoted intermediate its ends to a wall of the housing, a connection between one end of the member and the pivoted handle, and av connection between the other end of said member and the plunger whereby on operation of the pivoted handle the plunger may be operated to drive'a staple. y

8. In a plier type stapling machine, a housing having substantially parallel side walls, a bottom wall, an open end and a handle integral with its open end portion, said housing formed of a single sheet of metal, a head within the housing, said head having a raceway therein, a guide for a staple strip, means for feeding the staple strip along the guide to feed the staples into the raceway, a plunger in the raceway-and movable therein to drive the staples, a handle extending through the open end of the housing and pivotally mounted on a side Wall thereof, an

operating member arranged within the housing and pivoted intermediate its ends, to a wall of the housing, an operative connection betweenV one end of said member and the pivoted handle, said plunger having an opening therein, and said operating member having an extension entering the opening in the plunger whereby on operation of the pivoted handle the plunger may be operated to drive a staple.

. 9. In a plier type stapling machine, a housing, said housing having an open end, an anvil mounted in the housing, a head within the housing and movable toward and from the anvil, said head having a raceway therein, a guide for a staple strip, means for feeding the staple strip along the guide to feed the staples to the raceway, a plunger in the raceway and shiftable therein to drive the staples, a handle extending through the open end of the housing and pivotally mounted on a wall of the housing, and a connection bef strip along the guide to feed the staples into the raceway, a plunger in the raceway and movable therein to drive the staples, a handle extending through the open end of the housing and pivotally mounted on a side wall thereof, an operating member arranged within the housing and pivoted intermediate its ends to a wall of the housing, an operative connection between one end of said member and the pivoted handle, and a connection between the other end of the member and the plunger whereby on operation of the pivoted handle the plunger may be operated to drive a staple'.`

11. In a plier type stapling machine, a housing having a handle rigid therewith, a handle pivoted to said housing, a housing pivotally mounted in the first housing, a head on said pivoted housing, said head having a raceway therein, an anvil on the first housing below said raceway, `a plunger slidable in the raceway toward and from the anvil, a guide in the pivoted housingfor a staple strip, means for advancing the staple strip toward the raceway to feed the first staple of the strip into the raceway, an operating member arranged within the housing and pivoted intermediate its ends, an operative connection between one end portion of the member and the pivoted handle, and a connection between the other end portion of said member and the plunger whereby on operation of the pivoted handle the plunger may be moved to drive a staple.

12. In a plier type stapling machine, a housing said open' end of the housing and pivotally mounted on the housing, a housing pivotally mounted in the first housing, a head on said pivoted housing, said head having a raceway therein, an anvil on the iirst housing below said raceway, a plunger slidable in the raceway toward and from the anvil, a guide in the pivoted housing for a staple strip, means `for advancing the staple strip toward the raceway to dispose the first staple of the strip in the raceway below the plunger, a spring engaging the pivoted handle and the pivoted housing, an operating member arranged within the housing and pivoted intermediate its ends, an operative connection between one end of said member and the pivoted handle, said plunger having an opening therein, said operating member having an extension entering the opening in the plunger whereby a connection is provided between the pivoted handle and the plunger, said spring adapted on the pivoted handle being moved against the action of the spring to rock the pivoted housing on its pivot to move its head in the direction of the anvil, saidhandle on further movement adapted through its connection with the plunger to operate the same in a direction to drive al staple, said spring adapted to return the handle and operating member to normal position on the handle being released,

and said operating member having a part to en- 'ber moves toward normal position whereby the head and pivoted housing. are also moved to normal position.

13. In a plier type stapling machine, a housing having opposite open ends, an anvil on said housing, a second housing, said second housing including a head havingia raceway therein, a guide for a staple strip, means for feeding the staple strip toward the raceway, said second housing insertable and removable through oneopen end of the first housing, means for pivotally mounting the second housing in the @rst housing,4 a handle extending through the other open end of the first housing and pivotally mounted thereon, a spring engaging theV plvoted handle and nthe pivoted housing, a con nection between the pivoted handle and the plunger, said spring adapted on the pivoted handle being moved against the action oi' the spring to rock the pivoted housing on its pivot to move @its head-inthe direction of the anvil,

through its connection withI the.) plunger to operate the same in a direction tordrive a staple, and a removable cover closingthe end ofthe iirst housing ,through which the second' housing may be inserted' and removed.

1li. In a plier type stapling machine, a nous. ing having opposite open ends, an anvilon said hous'mg, a second housing, said second housing including a hollow elongated body portion having a head at one end thereof, said head includin'g a pairV of separable parts each made of asing'le piecebf Asheet metal and one of which is integral with said elongated body, said parts of the head co-operating to provide a racevvay in the head, a guide in the elongated'body por` tion of the second housing for a staple strip, means for feeding the staple strip ytoward the raceway, said second housing insertable through one Vopen end of the iirst housing;V means for pivotally mounting the second housing inY the first housing, a handle extending Ythrough the other open end of the first housing and pivotally mounted therein, a spring engaging the pivoted handle and the pivoted housing, a connection between the pivoted handle and the plunger, said spring adapted on the pivoted handle being moved against the action of the spring to rock-the pivoted housing on its pivot to move its head toward -the anvil, and said handle on further movement adapted through its connection with the plunger to operate the same in a direction to drive a staple.

15. In a plier type stapling machine, a housing housing, a second housing pivotally mounted inY the iirst'housing', a slidable plunger in the second housing, means in the second housing :forY guiding and feeding a staple strip to the plunger, an anvil on the'rst housing below the plunger, said second housing being movable about its pivf.- ot to shift the-'plunger and staple guide toward the anvil, an4 operative connection between the plunger and the pivoted handle, and means tending to move the pivoted housing toward the anvil. l'

16. In a plier type stapling machinefa housing having a handle, a second handle pivoted to the housing, a second housing pivotally mounted in the first housing, a slidable plunger in the free end of the second housing, means in the second housing for guiding and feeding a staple strip to the plunger, an anvil on the rst housing beneath the plunger, the second housing being movable on its pivot to shift the plunger and staple guide toward the anvil, an operative connection between the second 'handle and the plunger forY forcing it toward the anviland means for moving the free end of; the pivoted housing toward 4the anvil prior to operation of the plunger on the initial movement of the handle.

17. In a plier type stapling machine, a heusing having a handle, a second handle pivoted to the housing, a second .housingpivoted in thenrst Maasai said raceway, means for advancing a staple strip along the guide to the raceway, a pivoted pawl mounted in the ,head member operated by a staple in the raceway to prevent a second staple entering "the 'riaceway until the rst staple is i Y Vdischarged therefrom, an operative connection said handle onYY furthermovement adapted fromrthe second lever to the plunger, an anvil in the iirst housing below the plunger, and means for an operation of the second handle shifting the free endgo the ipivoted housing toward the anvil prior 'to operation of the plunger.

i8. In a plier-type stapling machine, va housing having' a handlaa second handle pivoted to the housingfa second housing pivoted to the first housing andhaving a raceway at its free end, a sliding plunger in the raceway, a` guide for a staple strip in theV pivoted'housing", means for advancing the strip along said guide to feed the samples to the raceway, an anvil'in the iirstA housing under the plunger, a pivoted pawl operated by a staple in the raceway to a position to prevent entrance of a second staple to the raceway while the first staple is therein, an operative connection from the second lever to advance the plunger to set a staple, and means to advance the free end of the pivoted housing toward the anvil on initial movement of said second handle.

19. In a plier type stapling machine, a housing, a handle rigid with said housing, mounted in the housing, a head Within the housing and movable toward and from the anvil, said head having a raceway therein, a guide for a staple strip, means .normally urging the strip along the guideway to feed the staples to the racewayf a plunger movable in the raceway to drive the staples, a handle pivoted to the housing, an'operating member pivotally mounted inthe housing, an;operative connection between-said "member and the pivoted handle, and an operative having a handle,-a second handle pivoted to the connection between said member and the plunger whereby on operation of the pivoted handle the head may move toward the anvil and the plunger operated A'to drive a staple. A

20. In aplier typestap1i ngA machine, a onepiece housing; folded up from sheet metal;y and an anvil including a handleprojecting from one end, the Y side walls being provided with alignednotches leading from the other end ofthe housing to provide a mouth for insertion of papers to be stapled, an'anvil at the lower side of thevmouth, a staple supporting housing pivotally mounted in the rst housing to swing toward and from the anvil, a staplegdriving plunger carried by said pivoted housing, anda second lever pivoted to the first housing and operatively connected to the plunger.

21.- In aY staple driving machine, a staple supporting housing comprising a piece of sheet metal folded into substantially U-shape: and the side walls having upwardextensions at their forward ends, a head member of folded sheet metal with the side walls foldedto slidably engage the .Y

iorward edges of said extensions to secure the head member on' the first member to provide a guideway, a staple driving plunger in the guide- `way, means forfeeding staples to the guideway under the plunger, and means 'for operating the plunger to set the staples. f

r FRIDOLIN POLZER. 

